musicmitchdavis on "Salient Off Canvas Nav Font Color"

I cannot find styling options for Salient's off-canvas navigation (menu) anywhere in Salient's option panel. The website is http://theroyalfiresound.com/. The menu is on the top right. When the off-canvas menu opens up, I want all of the menu text (as well as the text in the bottom left and social media links in the bottom right) to be #333333, instead of white (unreadable). I'm not good with coding CSS, any help?